What can a drop of liquid mercury be described as?

A) a pure substance and a compound

B) an impure substance that is reactive

C) an impure substance that is unreactive

D) a pure substance and an element

Four properties of water are listed. It has high thermal conductivity. It reacts with metals to form metal hydroxide and hydrogen gas. When heated to 100 °C, water evaporates. It decomposes to form hydrogen and oxygen.

Transition metals tend to A. form cations B. lose electrons from the ns subshell first C. form more than one ion D. all of the above

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

3. Convert 145J to cal (34.65 cal)

A period three element has 738, 1451, and 7733 kj/mol as its first three ionization energies. what is the symbol of this element?

A balloon containing 0.0400 mol of a gas with a volume of 500 mL was expanded to 1.00 L. Answer the questions and round answers to nearest hundredth place. Which equation should you use to find the amount of gas added?

Can quadrilateral RSTU be a parallelogram

Four moles of hydrogen chloride (HCl) gas react with one mole of oxygen (O2) gas to produce two moles of chlorine gas (Cl2) and two moles of water gas (H2O).

The density of rubbing alcohol is 0.785g/mL at 25 Celsius. Calculate the mass of 15.0 mL of the rubbing alcohol.

Is the universe an isolated system?